Vanner-roller.



H. L. JENNINGS.

VANNER ROLLER.

'APPLIGATION :FILED JULY 8, 1908.

962978@ Patented N0v.3,1908.

JKT/mig wet with the water, wit

^ peripher ervaren VANN'ER-ROLLER.

Specification of Letters Patent.

Patented Nov. 3, 1908.

Application mea July s, 190s. serial No. 442,565.

T o all whom tt 'may concern:

Be it known that I, HARRY L. J ENNINGs, a citizen 4of the United States, residing at Cananea, in the Republic .of Mexico, have invented a new and useful vanner-Roller, of which the following is a specification.

This invention relates generally to vanner rollers, and more particularly to a novel form of sheath or cover therefor.

All vanners, or practically all, but especially those of the six foot frue type are so constructed that the vanner belt on which the se aration of the metals from the sand or roc takes place, forms a large and almost flat surface, this being due to the fact that the belt passes over and around a series of closely assembled metal rollers. Generall these rollers are made of very thin and Sofitiron tubin and aresupported at their ends by suitab e castings carrying journals about which the rollers revolve.

As is well known, thereis always acid of some kind resent .in all milling ores, and when these latter are undergoin ,the milling process, theyfaresubjected to t v'e action of water, and this latter causes the acids to dissolve producing .therebly a serious eect on all soft iron'in which y come in contact, as rusting and erosion inevitably result.

The vanner belt, when in operation, is constantly movin through a bath of the acidulated water a ove referred to and thence passes over and around the soft metal vanner rollers, thereby causin them always to be the result that rust andscaling ensue. As soon as the rollers begin to rust, they grow rou h, and in operation cut and wear out the arge and expensive vanner belt, which is indispensable in the present system of milling ores. A ain,"the se rollers are often softer on one side t an on the other or in spots, and the acid will naturally attack and destroy the softer parts more rapidly than the harder, and thus cause the of the rollers to become uneven, and furt er so to weaken them as 'to allow them to bend under the weight' of the vanner .belt and its traveling load. When bent, the

rollers will not revolve, and so as the vanner belt is dragged thereover the attrition and wear are pro ortionably augmented. These defective rol ers also cause sunken laces to be formed in the vanner belt in w ich the' concentrates accumulate in such quantities as 'necessitates their bein raked ofi", or an extra amount of water being used, and this latter feature is objectionable as the concentrates are washed off with the tailings and are lost.

- The object of the present invention is in a ready and ractical manner to obviate all of the objectionablev features above enumerated, without adding material cost to the apparatus, or in any way changing its construction.

rlhe invention consists in the various novel details of construction of a sheath for vanner rollers, -as will be hereinafter fully described and claimed.

In the accompanying drawings forming a part of this specification, and in which like characters of reference indicate corres onding parts: Figure 1 is a broken vertical on itudm-al section view through a vanner rol er equipped with the improvements of the present invention. Fig. 2` -is a similar view through the sheath. Fig. 3 is a sectional detail view, on an enlarged scale of a portion of the sheath. Fig. 4 is a detail sectional view, of a p ortion of an ordinary vanner roller such as 1s 1n common use.

' The roller 1 is, as usual, constructed of a tube of relatively thin soft iron, and its ends are closed by two heads 2 that are held in position by fractional contact with inner walls of the roller.V In order to limit the inward insertion of the heads, each is provided with a'ciroumferential shoulder 3, and these two shoulders abut against the ends of the tube as clearly shown 1n Fi 1, the eripheries of .the shoulders bein disposed ush with the outer face of the ro' ler.

The' heads carry 'ournals 4 which are threaded into central orifices, each of the 'ournals being provided with a shoulder 5 to ear against the outer wall of the head thus to insure a rigid connection, and also accurate alinement of the journals. Tofacilitate the removal of the journals, each is provided at its outer ends "with a polygonal extension 6to be engaged by a suitable wrench. By having the journals detachable from the heads, repairs may readil be effected, and a material saving will resu t, as it will not be necessary to remove the heads and cast them aside, whenv the journal bearings become Worthless.

The essential feature of the invention re` sides in a novel form of sheath, which is so constructed as it will not only entirely protect the roller, but will also preclude entrance thereto of water, acidulated or otherwise.

lll)

This' Sheath, .Which'is Shawn in 'def-,ail in Fig.

2 comprises a body portion 7 constructed of relatively hard rubber, such as is usually employed `in rubber -belting, and two relatively soft terminals 8. As shownin Fig. 3,

lthe body portion is a multily structure,

`that is to say, is composed of two plies of rubber 9 interposed by fabric 10, such as canvas, and to which the plies are vulcanized.,f The terminals 8 are made of soft single ply, andv highly elasticy rubber and are' vulcanized to the ends of the body portion whereby to permit of their being .turned back, as shown in Fig. 1, when the roller is to be removed for any purpose. The flanges are designed 4to bear tightly against the outer ends of the heads,and with sufficient force to preclude entrance of water to the roller. As usual, thev ends of theheads on their outer faces are circumferentially reduced at 11, and the flanges engage these portions and thus lie Within the planes of the l outer yfaces of the heads, and are thereby pro-- tected from injury as by'contact with the vented, anda large savin 'mining machine of th1s c aracter Wlll be parts of the vanner belt sup orting frame in which therollers are journa ed It will be seen from the foregoing description that by the provision of the sheath such as' described, the vanner Irollers will be positively protected against injury as from the action of the acidulated water, so that uneven wear of the vanner belt will be presecured.

In Fig. 4 thereis shown the ordinary form of vanner roller in which the head 12 and journal 13 are integral. By this arrangement should the journal break or wear unevenly, it will necessitate the removal ofin operating a.

roller.

number of plies without departing from the spirit of the invention.

lAn advantage accruing from the soft and Y highly elastic terminals is that the sheathmay be removed'from the roller with ease, and further the Contact between the flanges and the heads will be of a character to secure the object sought.

l claim:

1. A sheath for a vanner roller having its body portion constructed of relatively hard.

rubber andl its terminals of soft rubber.

2. A sheath for vanner-'rollers having its body portion constructed of multiply rub- `ber and its terminals'single ply rubber.

3. A sheath'for vanner rollers constructed of rubber, the intermediate portion of which is multi-plyl and relatively hard, and the terminals of which are single ply'and relatively soft. i

'4. A sheath for vanner rollers constructed of acontinuous seamless tube of rubber and having its terminals Ainturned to form flanges.

5. A sheath for valmer rollers constructed of rubber, the` intermediate portion of which is multi-ply and the vterminals of which are single ply and inturned to form flanges. l d j 6. The combination with a vanner roller of a sheath constructed ofv a continuous seamless tube of rubber having terminal inturned flanges to engage the ends of the 7. The combination withia vanner roller, of heads carried thereby and havin their outer faces circumferentially reduce of 'a continuous seamless rubber sheath engaginCr the roller and having terminal "nturned ian es to engage the reduced portion vofthe eads.

In testimony that l claim the foregoing as my own, I have hereto affixed my'signature in the presence of two witnesses. n

HARRY L. JENNINGS.- Witnesses: i

M. F. MICKEY, -W. E. MITCHELL.' 

